Perhaps you should try some spelling variations:
"public administration" » "publica administration" (Expand Search), "publico administration" (Expand Search), "publicas administration" (Expand Search)
"publicoaaaas administration" » "publicaoaaaas administration" (Expand Search), "publicooaaaas administration" (Expand Search), "publicasoaaaas administration" (Expand Search)
"publicaa administracao" » "publicaaa administracao" (Expand Search), "publicoaa administracao" (Expand Search), "publicasaa administracao" (Expand Search), "publica administracao" (Expand Search), "publicas administracao" (Expand Search), "publico administracao" (Expand Search)

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("public administration") OR ("publicoaaaas administration"))) OR ("publicaa administracao"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"public administration\") OR (\"publicoaaaas administration\"))) OR (\"publicaa administracao\"))".
• Removing quotes may allow a broader search: (((( public administration ) OR ( publicoaaaas administration ))) OR ( publicaa administracao )).
• Adding a wildcard symbol may retrieve word variants: (((("public administration") OR ("publicoaaaas administration"))) OR ("publicaa administracao"))*.